Two days after the serial bomb blasts in Bodh Gaya, Patna police acting on directives from central agencies, on Tuesday picked up four persons from different localities in the city.
The four suspects have been identified as Anand Prakash, Gunjan Patel, Hassan Mallik and Priyanka.
Sources said, the two women and men, all in their early twenties, were present at Bodh Gaya on Sunday morning and had checked out of Tathaghat Hotel at 6am in the morning, just minutes after the serial blasts took place.
Sources said, the NIA team having scanned the records of visitors who stayed in nearby hotels near the the Mahabodhi temple zeroed in on the four, after noticing that the suspects were observed around the heritage site late evening on the intervening night of July 6 and left at 6 am of July 7.
The cause for suspicion was their movement inside the temple complex in the wee hours of July 7, as captured in CCTV cameras.
"The CCTV footage has snapped them 'moving in a suspicious manner inside the temple premises in the wee hours. It's circumstantial evidence which we are working on," said a senior police officer, seeking anonymity. Mobile records of the four have also been scanned.
A team of Gaya police also assisted the Patna police in picking up the four persons, who were being interrogated at an undisclosed location, sources said.
Meanwhile, senior police officers including the DGP, Bihar Abhayanand and ADG (headquarters) Ravindra Kumar refrained from making any comment on the detention of the four suspects and gave no official confirmation.
"We have no knowledge about the detention of the four persons regarding the blasts," said ADG (headquarters).
An official told HT on condition of anonymity, that the two couples seemed to be lovers, though nothing is ruled out until they were taken back to Gaya and debriefed by the central agencies investigating the blasts.